FLATTISH Antonyms There is 1 antonym of the word flattish. (opposite meanings)Definition of FLATTISH flat flatten flatter flatters flattered Best Opposite Words For FLATTISHTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb WordSaveSyns..UsageTypehillyadjectiveadjadjective satellite • having hills and crags Alternatives for HILLY Words (16)craggedcraggymountainousbumpyelevatedjaggedlumpyprecipitousrockyrollingruggedsharpslopingsteepunevenundulatingOpposite words for hilly